The so called mystery items on the “secret menu” can certainly be taken advantage of, but apparently only at select McDonald’s locations.

According to Mashable and their comments on the topic “Any requests for extra items or changes to our products are considered at the restaurant manager’s discretion and any additional items may be charged for.” So we guess you will just have to go and try your luck and see.

The UK McDonald’s manager further published that any additional ingredient added to an existing menu item is considered a “grill order.” To be able to order from the “secret menu” you apparently have to just request your desired ingredients, as the staff may not know the “secret menu” names off of the burger alone, (see the list below).

An example of a “secret menu” options is McGangbang, which is a McChicken Sandwich inside of a McDouble. Or for vegans the sea and Air Burger might be a better options. There is also the possibility of ordering the Big Mac, Filet-O-Fish, and the McChicken all as one burger. If that doesn’t cure the big night out, what does?

Earlier this year the fast food chain published that it would sell the relish, mustard, onion, garlic and fructose corn syrup blend recipe in-store. We guess it´s for those who doesn’t think there´s enough on the burger already. For now only Australian customers will be able to get their hands on the 25ml bottle from one of their 920 venues for 50 cents, however limited. Only 600 bottles will be stocked at each location. Further McDonald’s has also decided to auction away the special edition, 1 of 200, 500ml bottle of the sauce on eBay where the final donation will go to Ronald McDonald House Charities in Australia. The top bid is currently around $18,010 USD.